Spark-arrester



No. 750,088. I PATENTED JAN. 19, 1904.

D. S. CHILD.

SPARK ARRESTER. APPLICATION TILED NOV. 3. 1902. 'no MODEL.

| 4,. V I 5 v '3 F L O anuauro'z wihmomzw m: NORRIS PETERS co'.PHOYO-LITKO. WASHINGTON c Patented January 19, 1904.

PATENT "OFFICE.

DWIGHT S. CHILD, OF HOLDEN, MISSOURI.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 750,088, dated January19, 1904.

Application filed November 3, 1902. Serial No. 129,963. (No model.)

To wZZ whom it may concern:

Be it known that I, DWIGHT S. CHILD, a citizen of the United States,residing at Holden, in the county of Johnson and State of Missouri, haveinvented new and useful Improvements in Spark-Arresters, of which thefollowing is a specification.

This invention relates to a spark-arrester; and the object of the sameis to provide simple and elfective means for preventing the escape ofsparks or heavy products of combustion from a smoke-stack by causing thesame to fall back into a part of the stack surrounding the mainsmoke-flue and be carried off by means of suitable conveying devices.

The invention consists in the construction and arrangement of theseveral parts, which will be more fully hereinafter described andclaimed.

In the drawings, Figure 1 is a transverse Vertical section of asmoke-stack embodying the features of the invention. Fig. 2 is a similarview of a portion of a smoke-stack, taken therethrough in a differentvertical plane. Fig. 3

.is a horizontal section on the line 3 3, Fig. 1.

Similar numerals of reference are employed to indicate correspondingparts in the several views.

The numeral 1 designates a smoke-stack of ordinary form and of thatshape usually applied to traction-engines. The lower terminal of thesaid stack is secured to the forward extremity of the boiler in theusual manner, and therein is a concentrically-arranged flue-tube 2,secured at its lower end by means of angleplates or analogous devices 3to the interior of the stack and at its upper end attached byangle-plates or other similar devices 4 to the outlet-cylinder 5 of thestack, the said cylinbaflle 6 provides a tortuous passage through whichthe smoke is caused to pass, and the sparks or heated cinders will bematerially cooled before arriving at the upper end of the said baflle. 2and between the latter and the lower cylindrical member of the stack 1are diametricallydisposed chutes 10, consisting of strips of metal bentinto substantial U-shaped form and secured between the tube 2 and thelower portion of the stack to form an obstruction in the space betweensaid tube and the lower part of the stack. Depending centrally from theper end of the tube the heavier particles carried thereby will fall overthe edge of said tube and pass downward through the lower portion of thestack and fall upon the chutes, and thence out through'the pipe 11. Bythis means the smoke is caused to issue from the outlet-cylinder 5 in acondition comparatively free from heavy particles of combustion andsparks, and when the improved device is used on a traction-engine fordriving threshing-machines and the like firing of adjacent buildings orhay-stacks will be prevented.

The improved spark-arrester is very simple in its construction, and toaccommodate'different applications thereof changes in the proportions,dimensions, and minor details may be resorted to without departing fromthe principle of the invention.

Having thus fully described the invention, what is claimed as new is Thecombination with a stack having an out- I let-cylinder secured in theupper end thereof, of a flue disposed concentrically within the stackand of less diameter than the said outlet-cylinder, the upper end of theflue projecting into the cylinder and secured to the latter to providean annular outlet between the cylinder and flue, a spiral baflle securedin the At the lower portion of the tube.

flue, and depressed substantially U-shaped obstructing-flangesinterposed between diametrically opposite portions of the lowerextremity of the flue and the body of the stack and forming closingpartitions, the lower central portions of the flanges having openingstherein communicating with depending tubes which are snugly held betweenthe flue and the body of the stack to provide directing-outlets for theproducts of combustion falling back into TO the stack, the tubesdepending from the flanges terminating above the lower end of the flue.In testimony whereof I aflix my signature in presence of tWo Witnesses.

DWIGHT S. CHILI). Witnesses:

J AS. H. ROGERS, W. A. CAMPBELL.

